/**
 *    Copyright 2009-2015 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.apache.ibatis.reflection.property;

import java.util.Locale;

import org.apache.ibatis.reflection.ReflectionException;

/**
 * 属性命名器
 *  @author Clinton Begin
 */
public final class PropertyNamer {
	/**
	 * 无参构造器
	 */
	private PropertyNamer() {
		// Prevent Instantiation of Static Class
	}

	/**
	 * 方法转为属性
	 * 
	 * @param name
	 * @return
	 */
	public static String methodToProperty(String name) {
		// 去掉get|set|is
		if (name.startsWith("is")) {
			name = name.substring(2);
		} else if (name.startsWith("get") || name.startsWith("set")) {
			name = name.substring(3);
		} else {
			throw new ReflectionException(
					"Error parsing property name '" + name + "'.  Didn't start with 'is', 'get' or 'set'.");
		}

		// 如果只有1个字母-->转为小写
		// 如果大于1个字母，第二个字母非大写-->转为小写
		// String uRL -->String getuRL() {
		if (name.length() == 1 || (name.length() > 1 && !Character.isUpperCase(name.charAt(1)))) {
			name = name.substring(0, 1).toLowerCase(Locale.ENGLISH) + name.substring(1);
		}

		return name;
	}

	/**
	 * 是否是属性
	 * @param name
	 * @return
	 */
	public static boolean isProperty(String name) {
		// 必须以get|set|is开头
		return name.startsWith("get") || name.startsWith("set") || name.startsWith("is");
	}

	/**
	 *  是否是getter
	 * @param name
	 * @return
	 */
	public static boolean isGetter(String name) {
		return name.startsWith("get") || name.startsWith("is");
	}

	/**
	 *  是否是setter
	 * @param name
	 * @return
	 */
	public static boolean isSetter(String name) {
		return name.startsWith("set");
	}

}
